Average solving time & Expand/Collapse all categories

I'm asking for a collum which shows the average solving time for each captcha type. If thats doable than maybe make this feature optional if those things do have an impact in the speed of the solving process. Should be good for debugging and improvement of captcha types.

Furthermore I like a "right click" menu button for expand and collapse categories like in SER.

+1

will try to add that on next release.

just added both for next release